CRJ50 Captain is instructed to cross ELLAN at 3;000 FT during ILS 17R to MCO; but cannot locate the fix in the FMC or on the appraoch chart. A revised clearance is issued and a normal landing ensues. ELLAN is later located but the label is on the opposite side of LOC course in the plan view.

Narrative

Orlando Approach was vectoring us for the ILS 17R. Eventually; ATC told us to maintain 3;000 FT until ELLAN and cleared us for the approach. ELLAN was not one of the fixes displayed by the FMS on the MFD. I looked at the chart for the MCO ILS 17R and saw several fixes along the final approach course; but not ELLAN. I called ATC and explained that ELLAN was not being displayed by our navigation system. ATC said to maintain 2;500 FT until GLOSI and again cleared us for the approach. The remainder of the approach was completed to a normal landing.The chart for the ILS 17R at MCO has six intersections labeled to the right side of the final approach course (FAC) and one (ELLAN) labeled to the left. I just didn't see that fix labeled to the left of the FAC. Next time I'll look at the profile view as well as the plan view. Also; the reason ELLAN didn't appear on the FMS/MFD is because the ILS 17R approach was selected using the VECTORS option. Even though we almost always receive vectors to final; it is better to select the full approach so that all the associated fixes are displayed. Often ATC makes speed or altitude assignments contingent upon crossing fixes not normally displayed when the VECTORS option is selected.